Multiplying device.



5 SHEETS-SHEET l.

PATENTED DEC. 19, 1905.

S. DE GOMILA.

MULTIPLYNG DEVICE.

APPLIUATION FILED JUNE s, 1905.

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S. DE GOMILA.

MULTIPLYING DEVICE.

APPLIUATION FILED JUNE 8, 1905.

5 SHEETS-SHEET 2.

No. 807,550. PATENTED DEC. 19, 1905. S. DE GOMILA.

MULTIPLYING DEVICE.

APPLICATION ULEB JUNE8,1905.

5 SHEETS-SHEET 3.

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PATENTED DEC. 19, 1905. S. DE GOMILA.

MULTIPLYING DEVICE.

UNITED sTATns' PATENT OFFICE.

SALVADOR DE GOMILA, OF MALAGA, SPAIN, ASSIGNOR T() JULIUS WELTER, OFMALAGA, SPAIN.

NIULTIPLYING DEVICE.

Specification of Letters Patent.

Patented Dec. 19, 1905.

Application iled June 8, 1905. Serial No. 264,280.

'To @ZZ whom t may concern.-

- paratus and are read under the multiplicands.

The novelty of this device especially consists in that the shaft drivingthe endless bands is connected by an intermediate shaft with the wheelcarrying the band which is placed on the figures of the multiplier.

In the annexed drawings, Figure lis a view of a plurality of panes whichare located in the front Wall of the apparatus. Fig. 2 shows theinterior parts of the device, partially in front view, partially insection. Fig. 8 is a top plan view of the multiplier-disk. Fig. 4 showsa plan view of the beginning' parts of the product-tables. Fig. 5 showsa writingtable intended to be arranged on the side of themultiplier-disk.

The front side of the apparatus seen by the user is divided, as shown byFig. l, with four superposed cases or panes, which are divided intwenty-five strips, all divided each into two rectangles by a horizontalline. In the latter are arranged, in a continuous order, the figures luntil 100. Within each of these rectangles is cut out. adjacent to thesaid horizontal center line, a looking-opening through which the numberscarried by the producttables may be seen. These product-tables areformed of endless bands l, Fig. 2 and 4, upon which are written orprinted the necessary numbers in the order shown by Fig. 4. rlhe numberof the bands is four. They are wound upon four pairs of rollers carryingpins, preventing the bands from slipping to one side or the other. Theshafts of these rollers are supported in a convenient manner in aframework, each of the anterior rollers carrying on one sideabevel-wheel is, meshing with a bevel- Wheel c', keyed upon the verticalshaft t. The lowerrnost bevel-wheel of this shaft meshes with a similarone keyed on the horizontal shaft g, the second wheel of which meshes,in turn, with a wheel keyed on the shaft of hand c, which is intended tobe put on the numbers of the multiplier. The hand, provided with anoperating-knob and a guide-pin CZ, may be rotated on a horizontal diskI), arranged in front of the front wall of the apparatus and on whichare written on a circular line the multipliers 1 to 100. The multipliermay be seen through a little aperture arranged in the band. When, forinstance, the multiplication 48 96 is to be executed, all that is to bedone is to put simply the lever c on the number 48 (this has been donein the position shown in the drawings) and then the product 4608 may beread on the front wall of the apparatus at 96. When more complicatedmultiplications are to be executed, the additions are effected on thetable shown in Fig. 5, in the panes of which the numbers appearing inthe looking-openings are written in a diagonal direction from the lefttop to the right bottom, according to the lines of the table. Then theaddition is effected. It', therefore, 48 is to be multiplied with6462818399, the material may readily read on the front Wall of theapparatus, and the product obtained and written in thecolumns of thetable is: 310215283152- For this multiplication the numbers of thedouble squares are to be read in the openings provided in the front wallof the apparatus. These numbers are read in their natural order, asshown by the following scheme:

When the entire multiplication 6462818399 896548, comprising thousandsof millions and shown, by way of example, in Fig. 5, is to be executedbesides the above-described operation, the hand is still to be operatedtwo times. It must irst be adjusted on the number 65 and then on thenumber 89.

IOO

The products read in the double squares are, in both cases, transferredinto the additiontable.

Having now fully described my said invention, what I claim, and desireto secure by Letters Patent, is-

A computing-machine comprising a plurality of endless bands, a pluralityof rollers upon which said bands are mounted, bevel gearwheels mountedupon the ends of the rollers which are located at one end of the bands,a shaft, a plurality of bevel gear-wheels mounted upon said shaft, oneof said gear-wheels meshing` with each of the gear-wheels of therollers, a bevel gear-wheel located adjacent the lower end of the shaft,a horizontal shaft,

'SALVADOR DE GOMILA.

Witnesses:

A. S. TRoUGHToN, D. R. BERCH.

